[gnumeric] Doc fix.

[Morten Welinder <mortenw src gnome org>]

commit 96ba2c590aa2533ba81e4e080f070fd6baae74ee
Author: Morten Welinder <terra gnome org>
Date:   Fri Mar 14 11:00:58 2014 -0400

    Doc fix.

 src/style-conditions.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/style-conditions.c b/src/style-conditions.c
index 3826564..5ada7d3 100644
--- a/src/style-conditions.c
+++ b/src/style-conditions.c
@@ -321,6 +321,7 @@ gnm_style_cond_get_alternate_expr (GnmStyleCond const *cond)
        case GNM_STYLE_COND_CONTAINS_BLANKS:
                negate = TRUE; /* ...and fall through */
        case GNM_STYLE_COND_NOT_CONTAINS_BLANKS:
+               /* This is imperfect.  Here we only look for space.  */
                expr = gnm_expr_new_funcall1
                        (gnm_func_lookup_or_add_placeholder ("ISERROR"),
                         gnm_expr_new_funcall2